Adhesive coating for ore-receiving surfaces



iv a BUYER LUCKENBKCH, 01F BROOKLYN, NEW YORK, ASSIGNOR T LUCKENBACH PROCESSES C0. (INGJ, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION 01! NEVADA.

ADHESIVE COATING FOR URE-RECJEIV INGSUBJEACESJ No Drawing.

To all whom it may concern:

Be it known that 1, Rome LUGKENBACH, a citizen of the Unitedstates, and a resident of the borou h of Brooklyn, county :of 5 Kings, city and tate of New York, have invented certain new and useful Adhesive Coatings for Ore-Receiving Surfaces, of which the following is a specification.

My invention relates to the vanner method of ore concentration in which ore in a finely divided state mixed with water to form a pulp is fed to a moving 'belt or other surface which is of such a character that the metallic particles will adhere there- 115 to while the gangue will not.

There are as far as I am aware two systems of vanner separation, one in which the nip is fed to a rubber belt which travels horizontally over pulleys. When the belt at reaches the pulley toward which its upper side is travelling and changes its direction of movement from the horizontal to the vertical the gangue and water of the pulp will fall ofi' by gravity. The metal content of the pulp has a slight affinity for the rubber of the belt and will adhere thereto for a short period of time even when it is on the under side of the belt. The metal will release itself from the belt about the at time it reaches the lower face of the pulley and is therefore separated from the gangue. l

- The objection to the rubber belt vanner is that the metal particles have such a slight afinity for the rubber that a considerable proportion of them is scraped and washed off by the gangue and water and is lost.

The second process is used with the same apparatus but the working surface of the belt is coated with a thin film of oil for at which the metal has a strong afiinity. When the gangue and water fall ofi the belt the metal (sulphide) will adhere to the oil and is scraped therefrom with the oil coating vide a process of concentration of oreswhereby the valuable mineral content of the Application filed August 15, 1917. Serial No. 186,644.

ore is separated from the valueless earthy or rocky gangue, by the employment of a material having a strong preferential affinity for minerals in the free or virgin state, as well as certain chemical combinations thereof. 7

The invention may be carried out with all minerals and their chemical compounds which are subject to concentration by the oil flotation process at present in use, as well as with other mineral substances which will not be acted on by the materials employed in the oil flotation processes.

A further object is to provide a compound which w1ll not only attract a certain class of materials but will retain them against dislodgment by centrifugal force or by agitation.

A further object is to provide a waterproof composition which will protect the belt or cylinder on which it is placed and willprevent v the particles adhering thereto from being washed ofi.

These and further objects will more fully appear in the following specification and claim:

In carrying out composition composed of an oil or grease and a resin, such as caoutchouc, mastic, shellac, congo, etc.

Preferably I employ a compound composed of petroleum grease and liquid rub- The liquid rubber may be made by dissolving Para rubber in a solvent. I prefer, to make the liquid rubber by dissolving i,- oz. of rubber in 1 gal. of the solvent.

T have found a substance known as nearturpentine as admirably adapted as a rubber' solvent. This material ll am informed and believe is a petroleum distillate from which the fat or grease content has been removed. Tt is a clear, limpid liquid having the appearance of gasoline, benzine, or naphtha, and the odor of kerosene. I prefer to employ this substance because of its vent of rubber may be employed.

Without being understood as limiting myself thereb ll prefer to use the ingredients my invention I provide a p 'eheapness, but any other hydrocarbon solin the foowmg proportions: petroleum grease 1 part, liquid rubber 1 part.

The resultant composition is a thick, viscous, syrup-like liquid. The rubber 1mparts to the oil an added quality of cohesion, and of resistance to water, thus preventing the oil from dissipating.

The composition is applied to the belt or other surface of a vanne'r machine in the form of an egitremel thin coating. Immediately the pulp strlkes the belt the selective qualities of the coating separate and retain the mineral content while the earthy particles pass over with the water leaving the mineral values adhering to the coating. When in its travel the coated surface-of the belt, when employed, reaches a position other than the horizontal with the coated side up, the water and the gangue will be discharged by gravity. The concentrates will adhere to the coated surface even when said surface is on the under-side of the belt.

As the belt continues its travel the coating is scraped or otherwise removed from the supporting surface and the concentrates removed therefrom mechanically or by. a suitable solvent. I prefer to remove the concentrates from the composition ina press so that the compound may be recovered. A new coating is then applied to the surface and the operation is repeated.

The water-proofing quality which the rubber imparts to the oil or grease prevents the latter from being washed or scoured from the surface of the belt and thereby effects a greatsaving ofthe oil.

The proportion of grease and rubber may vary considerably as depends upon the quality or kind of ore operated upon and for various other reasons.

The process is carried out in connection with a pulp formed of'ore, and water at the normal temperature of the mine, or mill;

The temperature of the'water has Patent of the United States is as follows An adhesive coating for ore receiving surfaces consisting of petroleum grease and liquefied rubber, whereby the mineral values in the pulp will adhere to the coating and the gangue will not.

This specification signed and witnessed this 13th dayof August, 1917.

. RoYE'R LUCKENBACH.

-Witnesses:

JAs. F. COLEMAN, THOS. S. BERGIN. 

